You need to import your geometry into Gambit. create a volume around the imported geometry, subtract your geometry from the volume, because of the symmetry of the flow field you need half that, use a plane to clip it, mesh, assigne your boundary conditions and start your run. Good Luck

Sashankh

December 2, 2008 01:58

Re: CFD Analysis of Model Aircraft

Hi,

I have created and subtracted the volume in GAMBIT. I've done this for half the wing at present. I plan to do this for the entire aircraft after this. But i'm getting an error during meshing abt skewness and i'm not able to sort it out. Any advice?

Thanks!

Ahmed

December 2, 2008 19:31

Re: CFD Analysis of Model Aircraft

change mesh density (number and distribution) until you are happy with the mesh, important to remember "No negative volume" it is unrealistic to advice on details without having a complete picture of what you are doing and what are your objectives from this simulation, for instance how big is your domain compared to the plane size, how many skewed cells compared to the total number of cells, is it subsonic or supersonic flow simulation, etc..............Good Luck

I have tried various mesh densities but to no avail. My aim is to visualize the flow over this wing and then insert wingtips and check the difference. If you have any advice it would be really helpful.

Also, any idea what the function "ignore size mesh" in Gambit will do when toggled on?

Thanks!

Wifi Lee

December 8, 2008 21:12

Re: CFD Analysis of Model Aircraft

Yes,I can help you in gridding your model!

siddiq

December 17, 2008 23:31

Re: CFD Analysis of Model Aircraft

Hi..i want a tutorial on meshing of a complete model aircraft,if anybody can help me in this regard...

You need to import your geometry into Gambit. create a volume around the imported geometry, subtract your geometry from the volume, because of the symmetry of the flow field you need half that, use a plane to clip it, mesh, assigne your boundary conditions and start your run. Good Luck

I saw your pictures of mesh. I always thought structured mesh can work much much better for this kind of case. And the generation of the structured mesh for this case is not very difficult. I'm wondering has anyone ever tested the accuracy of the unstructured mesh for this kind of case comparing with the structured mesh? Any experience on that?